/*
7-196 Loan Calculator
分数 10
作者 姚晓玲
单位 临沂大学

You take a loan from a friend and need to calculate how much you will owe him after 3 months.
You are going to pay him back 10% of the remaining loan amount each month.
Create a program that takes the loan amount as input, calculates and output the remaining amount after 3 months.

Here is the monthly payment schedule:
Month1
Payment: 10% of 20000 = 2000 Remaining amount: 18000
Month 2
Payment:10% of 18000=1800 Remaining amount: 16200
Month 3:
Payment: 10% of 16200=1620 Remaining amount: 14580
输入格式:

input a load amount from user at keyboard
输出格式:

output the remaining amount after 3 months.
Sample lnput:

20000

Sample Output:

14580
*/

#include <stdio.h>

int main() {
    int loan;
    scanf("%d", &loan);
    for (int i = 0; i < 3; i++) {
        loan = loan * 0.9;
    }
    printf("%d", loan);
    return 0;
}